Roll src/third_party/skia/ 27c565adb..ac6c75056 (4 commits).
Roll src/third_party/skia/ 27c565adb..ac6c75056 (4 commits).

https://chromium.googlesource.com/skia.git/+log/27c565adbed6..ac6c75056f1e

$ git log 27c565adb..ac6c75056 --date=short --no-merges --format='%ad %ae %s'
2016-04-25 msarett Remove SkEncodedInfo kUnknown_Color and kUnknown_Alpha from public API
2016-04-25 halcanary SkStringPrintf and SkString::printf now are no longer limted by a static buffer
2016-04-25 reed simplify handle-affine: subclass overrides just describe their leaf behavior
2016-04-25 herb Whitespace change.

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
TBR=stephana@google.com

Review URL: https://codereview.chromium.org/1920963002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#389522}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk